---Seems no one knows _____ what happened to Malaysia Airline Flight 370.
---It’s really sad, hope more and more resources will be offered in the search.
| A．exactly | B．especially | C．hardly | D．quickly |
I think he is one of ___________ players in the world.
| A．good | B．better | C．best | D．the best |
You shouldn’t drive for more than three hours without ______ a rest.
| A．have | B．to have | C．having | D．had |
There were few doctors, _____ he had to work very hard _____ his own.
| A．and; in | B．because; at | C．so; on | D．when; for |
Many people were dying ________ they didn’t get to hospital quickly enough.
| A．but | B．so | C．and | D．because |
________ it is over, everyone helps wash the dishes.
| A．After | B．Before | C．When | D．As soon as |