The great wall _________ all over the world.
A. knows
B. knew
C. was known
D. is known
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The school bag ____behind the chair.
A. puts
B. can be put
C. can be putted
D. can put
A large number of engineers ____________to Africa by our government to help the people there.
A. have sent
B. will send
C. send
D. are sent
Don't worry. You ________ plenty of time to decide.
A. will give
B. have given
C. will be given
D. are giving
---Do you like the material?---Yes, it __________ very soft.
A. is feeling
B. felt
C. feels
D. is felt
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