Not until he went through real hardship ______ the love we have for our families is important.
| A．did he realize | B．had he realized |
| C．he realized | D．he had realized |
The wet weather will continue tomorrow when a cold front ________ to arrive.
| A．is expected | B．is expecting |
| C．expects | D．will be expected |
We first met on a train in 2010，but we both felt immediately that we ________ each other for years.
| A．knew | B．have known |
| C．had known | D．know |
—I'm sure Andrew will win the first prize in the final.
—I think so.He ________ for it for months.
| A．is preparing | B．was preparing |
| C．had been preparing | D．has been preparing |
I like these English songs and they ________ many times on the radio.
| A．taught | B．have taught |
| C．are taught | D．have been taught |
—Did you watch the basketball match yesterday?
—Yes，I did.You know，my brother ________ in the match.
| A．is playing | B．was playing |
| C．has played | D．had played |