A or B?
Proofreading
Fill-in the blanks
100

If a cat does not drink enough water, it (dies/may die).

If a cat does not drink enough water, it may die.

100

Cats will purr when they want to express their happiness.

Cats purr when they want to express their happiness.

100

If a cat ____________ (catch) a toy, it _____________ (play) with it for hours.

If a cat catches a toy, it will/may play with it for hours.

200

The elephants (cry/may cry) if they (lose/may lose) their home.

The elephants may cry if they lose their home.

200

Elephants produce low-frequency sound to guide the baby elephants, when they walk together in a group.

Elephants produce low-frequency sound to guide the baby elephants when they walk together in a group.

200

If an elephant ___________ (need) to drink water, it ___________ (use) its trunk to suck up and spray water into it mouth.

If an elephant needs to drink water, it uses its trunk to suck up and spray water into it mouth.

300

If the mother eagle (catches/will catch) its prey, it (feeds/will feed) the baby eagles first.

If the mother eagle catches its prey, it feeds the baby eagles first.

300

If we protect the environment for the eagles, the population of eagle increases.

If we protect the environment for the eagles, the population of eagle will increase.

300

If an eagle _____________ (catch) its prey, it __________ (use) its sharp beak to eat.

If an eagle catches its prey, it uses its sharp beak to eat.

400

When a sparrow (need/needs) to mark its territory, it (produces/ will produce)  low-pitched and aggressive-sounding calls.

When a sparrow needs to mark its territory, it produces low-pitched and aggressive-sounding calls.

400

A sparrow produces melodic and higher-pitched sounds, if it wants to attract its mate.

A sparrow produces melodic and higher-pitched sounds if it wants to attract its mate.

400

If a sparrow _________ (be) disturbed by its predator, it _______________ (attack) the predator. 

If a sparrow is disturbed by its predator, it may/will attack the predator.

500

If the number of prey (decreases/will decrease), a lot of lions (die/will die).

If the number of prey decreases, a lot of lions will die

500

If a lion roars, it can communicate with other members.

If a lion roars, it communicates with other members.

500

If a lion _________ (be) threatened by humans, it __________________ (return) to safer areas.

If a lion is threatened by humans, it will/may return to safer areas.

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