We can never forget the days _______ the two astronauts in spaceship worked together and the days ________ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
—How did she get infected?
—She ____ the viruses without any protection.
| A．exposed to | B．had exposed to | C．was exposed to | D．has exposed to |
With two children _____ middle school, the parents are working hard.
| A．attended | B．being attended | C．having attended | D．attending |
—Have you got any job offer?
—No, I______.
| A．am waiting | B．waited | C．had waited | D．have waited |
If the weather had been better, we could have had a picnic. But it _____ all day.
| A．rains | B．has rained | C．rained | D．is raining |
I was tired of school work, but my father told me that he didn’t _____school this year.
| A．approve my leaving | B．approve me to leave |
| C．approve of my leaving | D．approve of me to leave |