Customers are asked to make sure that they________the right change before leaving the shop.
| A．will give | B．have been given | C．have given | D．will be given |
We’ll look into the case as soon as we can. Just be ________, please.
| A．slow | B．silent | C．patient | D．comfortable |
I don’t know whether he has finished the novel, but he ________ it this morning.
| A．was reading | B．has read | C．read | D．had read |
________ time went by, small clever animals covered the earth and have become the most important animals on the planet.
| A．With | B．As | C．Because | D．During |
________ at the result, the boss left without saying any word.
| A．Having disappointed | B．Disappointing |
| C．To be disappointed | D．Disappointed |
It was quite a job for her to ____ several children all by herself during the war.
| A．dress up | B．bring up | C．tie up | D．add up |