.
If you use another method to solve this problem, you’ll probably ______ it.
| A．make | B．get | C．finish | D．take |
It’s hot in the shopping mall, because the air-conditioning system ______.
| A．broke up | B．broke down | C．broke in | D．broke out |
--- It’s the fourth time that heavy smog(雾霾) has hit the city this month.
--- It’s high time we _______ measures to fight air pollution.
| A．will take | B．took | C．to take | D．taking |
Science has given clear evidence ______ smoking can lead to many diseases.
| A．what | B．which | C．that | D．where |
We admire this family, ______ the parents treat their child like a friend.
| A．why | B．which | C．where | D．that |
The weather in Inner Mongolia is always dry, but sometimes it _____ rain heavily.
| A．need | B．can | C．must | D．shall |