He is always clever. I wonder how it_____that he should have failed the simple test this time.
| A．came about | B．came over | C．came up | D．came out |
If you want to own an iphone 6 ahead, you'll have to make a(an) _____, or you will wait for some time.
| A．preservation | B．reservation |
| C．order | D．application |
During the meeting a young man cried out suddenly and threw his notebook at Ma Yingjiu, ________brought the room to disorder.
| A．this | B．it |
| C．and that | D．and which |
----What do you think of the new English teacher?
----____she is an elegant lady, she can be extremely difficult to work with.
| A．While | B．When | C．As | D．Even if |
My father retired in 2008, _____ he has been devoting his time to gardening.
| A．at which | B．since when |
| C．when | D．after that |
Anyone, once____ positive for Ebola, the deadly disease, will receive free medical treatment from the government.
| A．testing | B．being tested |
| C．tested | D．to test |