TOEFL Grammar

Incomplete Sentences

100

The planet Mercury _______ rotations during every two trips around the Sun.

(A). three complete

(B). completes three

(C). the completion of three

(D). completing three of the

(B). completes three

200

The helicopter is able to hover in ______ powered rotors produce lift even at zero forward speed. 

(A). flight because of the

(B). flying the

(C). the flying of the 

(D). flight because

(D). flight because

300

The upper levels of the SUn's atmosphere are of very ____ heats the gases there to very high temperatures.

(A). dense and solar

(B). density, solar activity

(C). density, but solar activity

(D). density and activity of the Sun is 

(C). density, but solar activity

400

Most slang terms are simply old words ______ additional new meaning. 

(A). give 

(B). given

(C). are given

(D). they are given

(B). given

500

Mountaineers ____ climb Mount Everest must make reservations to do so, often up to seven years in advance.

(A). want to 

(B). they want to

(C). who want

(D). wanting to

(D). wanting to

Identify Incorrect Word

100

The wave ^lengths of ultraviolet light are ^short than ^those of visible light ^but longer than those of X-rays.

short -> shorter 

200

By ^measuring the rate of decay of potassium isotopes in volcanic ash, scientists ^{can date} the layers of volcanic ash and any human ^remains in ^they. 

they -> them

300

By the ^{time of} the dinosaurs, turtles ^have already developed the hard shell ^{into which} their heads and legs could be ^drawn.

have -> had

400

The electromagnetic ^spectrum consists ⁱⁿ bands of different ^wavelengths.

in -> of

500

The Ford Motor Company introduced the ^moving assembly line in 1914 so that it ^will be able to meet the huge ^demand for ^its Motel T.

will -> would

Structure

100

I once studied the piano _____.

(A). from three years

(B). since three years

(C). for three years

(D). for three ago

(C). for three years 

200

We bought some lemons _________ we extracted the juice.

(A). from which

(B). with witch

(C). on which

(D). in which

(A). from which

300

The camper ________ peacefully on the bank when a crocodile came creeping closer. 

(A). had slept

(B). slept

(C). has been sleeping

(D). was sleeping

(D). was sleeping

400

It is risky to ride a bike ______ with no lights.

(A). at night

(B). in night

(C). on night

(D). for night 

(A). at night

500

Dad went to the hotel _____ and returned with a friend.

(A). for while

(B). for a while

(C). while

(D). in a while

(B). for a while

Correct the sentence

100

He is so slow as he never gets to class on time.

He never gets to class on time because he is so slow.

200

The suitcase is as heavy that I can hardly carry it.

The suitcase was too heavy, I can hardly carry it.

300

We had so a small lunch that I am hungry already.

We had such a small lunch that I am hungry already.

400

Preparing frozen foods is too easy that anyone can do it. 

Preparing frozen foods is so easy that anyone can do it.

500

It is so nice weather that I would like to go to the beach.

The weather is so nice that I would like to go to the beach.