1 . The days are gone ______ physical strength was all you needed to make a living.

A．when

B．that

C．where

D．which

2 . _____is known to all, China will be an _____and powerful country in 20 or 30 years or so.

A．That; advancing

B．This; advanced

C．As; advanced

D．It; advancing

3 . The number of people invited________ fifty, but a number of them________ absent for different reasons.

A．were; was

B．was; was

C．was; were

D．were; were

4 . It suddenly occurred to him ________ he had left his keys in the office.

A．whether	B．where
C．which	D．that

5 . 【2018·江苏】Self-driving is an area _______ China and the rest of the world are on the same starting line.

A．that	B．where
C．which	D．when

6 . I __________ to send Peter a gift to congratulate him on his marriage, but I couldn’t manage it.

A．had hoped	B．am hoping
C．have hoped	D．would hope

7 . They are trying to make sure that 5G terminals ________ by 2022 for the Beijing Winter Olympics.

A．will install

B．will have been installed

C．are installed

D．have been installed

8 . (2016·天津)The manager put forward a suggestion __________ we should have an assistant. There is too much work to do.

A．whether	B．that
C．which	D．what

9 . Many countries are now setting up national parks ________ animals and plants can be protected.

A．which

B．where

C．whose

D．that

10 . 【2018·北京】She and her family bicycle to work, _________ helps them keep fit.

A．which	B．who
C．as	D．that