It is difficult, so I suggest that you __ it to an expert.
| A．should leave | B．will leave | C．are leaving | D．may leave |
It ___ have been Tom that parked the car here , as he is the only one with a car.
A may B can C must D should
______ is our belief that improvements in health care will lead to a stronger ,more prosperous economy.
| A．As | B．That | C．This | D．It |
---Could you be so kind as to close the window?
---______
| A．With pleasure | B．Go ahead | C．Yes , please | D．That’s OK |
News came from the school office _____Wang Lin had been admitted to Beijing university.
A which B what C that D where
. It was not until she got home ___ Jennifer realized she had lost her keys.
| A．when | B．that | C．where | D．before |