China is getting more and more independent of Western technology， _____ it is leading in many fields， such as the self﹣driving car industry．（ ）
A．/B．orC．butD．and
Spending time with families _______ the happiest thing．（ ）
| A． |
are |
B． |
is |
C． |
be |
I _______ Ding Talk _______ Tencent Meeting, what about you？（ ）
| A． |
prefer； to |
| B． |
would rather；than |
| C． |
like；than |
No one can tell when they．
When they _______, I'll let you know at once．（ ）
| A． |
return； will arrive |
| B． |
will return；reach |
| C． |
will return；arrive |
It has been two months since my father _______ for Italy．（ ）
| A． |
was left |
B． |
left |
C． |
leaves |
I'm sorry， mom． I made a mistake in the exam．
_______．Be careful next time．（ ）
| A． |
You'd better not． |
| B． |
It's too terrible． |
| C． |
It doesn't matter． |