She always comes to our help when we get into trouble____ she is very busy.
| A．ever since | B．once |
| C．even if | D．so that |
Taking on this challenge will bring you ______ someone who shares your interests．（ ）
| A． |
in exchange for |
B． |
in answer to |
| C． |
in contact with |
D． |
in memory of |
The outbreak of Covid﹣19 has meant an ______ change in our life and work．（ ）
| A． |
absurd |
B． |
abrupt |
C． |
allergic |
D． |
authentic |
If I hadn't been faced with so many barriers，I ______ where I am．（ ）
| A． |
won't be |
B． |
wouldn't have been |
| C． |
wouldn't be |
D． |
shouldn't have been |
There will still be lots of challenges if we are to ______ garbage in a short time．（ ）
| A． |
clarify |
B． |
justify |
C． |
satisfy |
D． |
classify |
Instead of getting down to a new task as I ______， he examined the previous work again．（ ）
| A． |
had expected |
B． |
have expected |
| C． |
would expect |
D． |
expect |