The new laws___________reducing the heavy traffic have come into___________.
| A．aiming at ; use | B．are aimed at; effect |
| C．aimed at; affect | D．that are aimed at; effect |
Bill Clinton became the youngest-ever US governor when he wasto represent Arkansas.
| A．selected | B．chosen | C．picked | D．elected |
. By the time you arrive in London, wein Europe for two weeks.
| A．shall stay | B．have stayed | C．will have stayed | D．have been staying |
. It’s nothing unusual to experience failure, and ought we to be so discouraged.
| A．in no time | B．by all means | C．by no means | D．in any condition |
Only when _______ according to the directions strictly will the medicine work well.
| A．taking | B．to take | C．taken | D．being taken |
It is not immediately clear__________ the financial crisis will soon be over.
| A．since | B．what | C．when | D．whether |