1 . Dogs are really unique from any other domesticated animals ________they reciprocate (回报) a bond with their humans.

A．even though

B．in that

C．until

D．so long as

2 . If the bottle of gas ________ fire, the whole building may ________.

A．will catch; be burnt off	B．catches; be burnt to the ground
C．is on; burn down	D．will be on; be burned to the ground

3 . ________difficult, deliveries of food, such as rice, vegetables and meat, must be guaranteed since “the lifeline cannot break.”

A．Whatever

B．Whether

C．As

D．However

4 . ______presenting a negative nucleic acid test within 24 hours, Shanghai residents are not allowed to leave the city.

A．If

B．While

C．Though

D．Unless

5 . It was 5:00 pm and I was ready to go home. I was about to turn off my computer ________ I received an email
from my director.

A．after

B．while

C．before

D．when

6 . Remember that you won’t be able to cancel the contract ________ you’ve signed.

A．unless

B．until

C．though

D．once

7 . ________, you can’t fool him.

A．The child though John is	B．Though child John is
C．As child John is	D．Child as John is

8 . Stores sell pet pants and bikinis, and doctors will perform cosmetic surgery ________your pet needs a facelift.

A．in case

B．even though

C．as if

D．ever since

9 . ________ it was my turn to perform, I walked to the piano as ________(calm) as possible, sat down, took a deep ________(breathe) and played the first part. (所给词的适当形式填空)

10 . We should learn more information technology ________ we can improve our teaching efficiency.

A．so that

B．in case

C．now that

D．even if