Fresno is big, but San Francisco is _____.
bigger
On our homework we work carefully, but on a test we work _____.
more carefully
My father is old, and my grandfather is even older, but my great grandfather is _____.
the oldest or eldest
With colleagues I pass the time happily, and with friends I pass the time even more happily, but with family I pass the time _____.
the most happily
___ United States is located between Canada and Mexico.
The
The weekend is pleasing, but a vacation is _____.
more pleasing
Students have to wake up early, but teachers have to wake up _____.
earlier
A card is thoughtful, and a gift is even more thoughtful, but a card and a gift is _____.
the most thoughtful
To earn a bachelor's degree we must study hard, and to earn a master's degree we must study even harder, but to earn a doctorate degree we must study _____.
the hardest
___ bird landed by my window, but my cat came and scared ___ bird away.
A, the
Wasting money makes me angry, but wasting time makes me _____.
angrier
In a museum we must conduct ourselves quietly, but in a library we must conduct ourselves _____.
more quietly
At 10:00 I feel sleepy, and at 11:00 I feel even sleepier, but at midnight I feel _____.
the sleepiest
A student with a "C has performed poorly, and a student with a "D" has performed even more poorly, but a student with an "F" has performed _____.
the most poorly
We drink ___ coffee out of ___ mug, not out of ___ glass.
0, a, a
One should always be generous, but during the holidays one should be _____.
more generous
In our first language people can seem to speak fast, but in our second language people can seem to speak _____.
faster
dogs are intelligent, and whales are even more intelligent, but apes are _____.
the most intelligent
Students in the intermediate level write well, and students in high intermediate write even better, but students in the advanced levels write _____.
the best
___ month with ___ fewest days is ___ February. It only has ___ 28 days, or 29 when it's a leap year.
The, the, 0, 0
A parking space for motorcycle is narrow, but a parking space for a bicycle is _____.
narrower
to reach the Moon we must travel far, but to reach the Sun we must travel _____.
farther or further
we ought to be attentive to our colleagues, and even more attentive to our friends, but to our family we ought to be _____.
the most attentive
Cars pollute the environment badly, and factories pollute the environment even worse, but oil spills pollute the environment _____.
the worst
___ people celebrate ___ Christmas by putting ___ presents under ___ tree and opening ___ presents on Christmas Day.
0, 0, 0, a/the, the