I know a little bit about the city as I __________ there for one year in my youth.
| A．am studying | B．had studied | C．studied | D．have studied |
When it comes to reducing stress, enough sleep and physical exercise can help, .
| A．so does proper nutrition | B．so proper nutrition does |
| C．so proper nutrition can | D．so can proper nutrition |
—Why did you leave without a word of warning to John?
—But whatotherwise? He never listens to me.
| A．could I have done | B．would I do |
| C．must I have done | D．should I do |
I think your health will soonif you do regular exercise.
| A．give up | B．take up | C．pick up | D．get up |
—Excuse me, but could you please turn the radio down?
—Sorry, Iyou could hear it.
| A．don’t realize | B．haven’t realized | C．didn’t realize | D．hadn’t realized |
With some technical problems to be solved, it may be a whilethe system is put into use.
| A．when | B．after | C．since | D．before |