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He ________ two thousand trees since 1985．

plants

planted

will plant

has planted

John fell asleep ________ he was listening to the music．

after

before

while

as soon as

We are doing much better ________ English ________ our teacher's help．

in; at

at; in

in; with

with; with

________ book on the desk is ________ useful one．

The; an

A; a

The; a

The;/

It's very hot in summer．These flowers should ________ every day．

water

are watered

are watering

be watered

The lazy boy isn't working as ________ as his brother．

hardest

harder

hard

hardly

I feel it hard to keep up with my classmates in study．But whenever I want to ________, my teacher always encourages me to work harder．

go on

run away

give up

look out

The boy isn't ________．He often makes a mistake in the exam．

enough

carefully

carefully enough

enough careful

careful enough

Lily, please be quiet!The others ________ hear clearly．

mustn't

can't

needn't

shouldn't

Please show me the ticket ________ the concert．

of

to

about

on