【推荐1】________ unemployment rate and crime rate are high, it can be supposed that the latter is due to the former.

A．Before

B．Where

C．Unless

D．Until

【推荐2】The islanders hadn’t got well prepared ________ they were required to relocate to a nearby island. In fact, it is only two or three years ________ some islanders moved here.

A．since; after

B．before; since

C．until; that

D．after; before

【推荐3】Humans must first of all eat, drink, have houses and clothing, _____ they can pursue politics, science, art and religion.

A．if	B．before
C．whether	D．how

【推荐2】Schools in the north tend to be better equipped, _______those in the south are relatively poor.

A．as

B．since

C．while

D．because

【推荐3】Some school teachers complain that many kids haven't got any hobbies—         we call playing computer games a hobby.

A．unless

B．once

C．since

D．if

【推荐1】If you don’t grasp this chance, it may be years ______ you get another one.

A．before

B．since

C．until

D．unless

【推荐1】China is playing a key role in controlling the virus. However, it will take long and much effort ________ it is under control.

A．until

B．after

C．before

D．unless

【推荐2】_____ I always felt I would pass the exam, I never thought I would get an A.

A．While	B．Once
C．If	D．Until

【推荐3】Mark needs to learn Chinese ________ his company is opening a branch in Beijing.

A．unless

B．until

C．although

D．since