1 . From helping in the search for outer-space homes ______ humankind could relocate if necessary, to ______ in mapping climate change, AI might be our best bet at survival.

A．where…assisting	B．which…assisting
C．where…assist	D．which…assist

2 . The teacher glanced _____ this student who was busy _____ a picture.

A．to; drawing

B．at; draw

C．at; drawing

D．at; to draw

3 . My brother advised me ______ in class.

A．pay attention to listen to the teacher

B．pay attention to listening to the teacher

C．to pay attention to listen to the teacher

D．to pay attention to listening to the teacher

4 . I regret __________ a lot of time playing computer games, which leads to my poor academic performance.

A．to waste

B．wasting

C．to have wasted

D．wasted

5 . China advocates ________ international law and universally recognized norms governing international relations, and promotes the ________ of common, comprehensive, cooperative and sustainable security.

A．to uphold; function	B．upholding; function
C．to uphold; vision	D．upholding; vision

6 . Go on ________ the other exercise after you have finished this one.

A．to be doing

B．doing

C．with

D．to do

7 . After          his son, he walked out,         in a blue hat, with his son.

A．dressed...dressed	B．being dressed...dressed
C．dressing...dressed	D．having dressed...being dressed

8 . We don’t want to risk ________ involved in a civil war.

A．beome

B．to become

C．becomes

D．becoming

9 . We’ve enjoyed having you on board and look forward ________you again in the near future.

A．to see

B．to seeing

C．at seeing

D．on seeing

10 . Stop ________ your job so often, as a ________ stone gathers no moss.

A．to change; rolled

B．to change; rolling

C．changing; rolling

D．changing; rolled