—Amy, please tell the people seated and ________ for their turns to come to my office five minutes later.
—Yes, sir.
| A．wait | B．waiting |
| C．waited | D．to wait |
Bill was doing a lot of physical exercise to build up his______.
| A．energy | B．strength | C．force | D．power |
—I wonder ______ you’ll water this kind of flower.
—Every other day.
| A．how often | B．how long | C．how soon | D．how much |
. She brought with her three friends, none of ______ I had ever met before.
| A．them | B．who | C．whom | D．these |
. — Why does the Lake smell terrible?
—Because large quantities of water______.
| A．has polluted | B．have been polluted |
| C．has been polluted | D．is being polluted |
Peter’s jacket looked just the same as Jack’s, but it cost ______ his.
| A．as much twice as | B．as twice much as |
| C．much as twice as | D．twice as much as |