We do jobs_____they need to be done and that could be early in the morning or late at night.
| A．that | B．which | C．when | D．how |
The fact has worried many scientists ________the earth is becoming warmer and warmer these years.
| A．what | B．which | C．that | D．whose |
The number of foreign students attending Chinese universities ________rising steadily since 2010.
| A．is | B．are |
| C．has been | D．have been |
Only then ________how much damage had been caused.
| A．she realized | B．she had realized |
| C．had she realized | D．did she realize |
Memories ________on him as soon as he met the friend whom he had not heard from for over thirty years.
| A．crowded in | B．resulted in |
| C．joined in | D．got in |
The shirt is so expensive. Can you reduce the price ________a third?
| A．to | B．by | C．of | D．at |