I haven’t seen you ___________

I haven’t seen you ____________.

#44828

for two months

since three weeks

since last Monday ago

two days ago

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Stamps are usually used _____letters.

#44752

to sending

to send

for send

for sent

Thanks to the Internet, different kinds of information        in a short time.

#44436

can be learned

has been learned

can learn

has learned

--- Can you tell me whom the play ______ in the 1990s?--- Sorry, I don’t know.

#44626

was written by

was written

is written

1s written by

Many trees ________ along the streets every year. So the air is very fresh now.

#44614

plant

are planted

planted

were planted

— Food problem is becoming a big one in China! —I think the food ________ before going to shops or supermarkets.

#44566

is checked

is checking

should be checked

should check

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