.
By the time he comes back, I’m sure we ________ all these rooms of the lab. Therefore, he doesn’t have to return.
| A．have cleaned | B．will be cleaning |
| C．will have cleaned | D．have been cleaning |
He told us whether _________ a picnic was still under discussion
| A．to have | B．having | C．have | D．had |
— I wonder ________ you’ll water this kind of flower.
—Once a week.
| A．how often | B．how long | C．how soon | D．how much |
—Hi, Tom. Any idea where Jane is?
—She _____in the classroom. I saw her there just now.
| A．shall be | B．should have been |
| C．must be | D．might have been |
—How about your journey to Mount Tai?
—Everything was wonderful except that our car _________ twice on the way .
| A．slowed down | B．broke down | C．got down | D．put down |
Professor Williams keeps telling his students that the future ______to the well-educated.
| A．belongs | B．is belonged |
| C．is belonging | D．will be belonged |