Before a problem can be solved，it must be obvious____the problem itself is.
| A．what | B．that | C．which | D．why |
The big fire in Shanghai, believed to ______ due to the burning of construction materials, caused 58 deaths and destroyed all the belongings of the people there.
| A．have occurred | B．occur |
| C．have been occurring | D．be occurring |
Your meaning didn’t really ______, John. I didn’t ______.
| A．get through; make it | B．get in; catch it |
| C．get away; help it | D．get across; get it |
— Hello, Sally. How’s everything going?
— ______.
| A．The same to you | B．I can’t agree more | C．That’s right | D．Surviving |
The girl hid herself under the table ______ she could see everything taking place in the room.
| A．after which | B．from where | C．from which | D．in where |
How long do you think it will be ________ the computer company puts forward a new product?
| A．before | B．since | C．until | D．that |