Had the governments and scientists not worked together，AIDS﹣related deaths _______ since their highest in 2005．（ ）
| A． |
had not fallen |
| B． |
would not fall |
| C． |
did not fall |
| D． |
would not have fallen |
______ about the missing Beijing-bound Malaysian flight that he decided to look for more information about it.
| A．So curious he was | B．So curious was he |
| C．Such curious he was | D．Such curious was he |
In his speech, he said that it was his primary school teachers that he was fond of ________influenced his whole life.
| A．what | B．which |
| C．as | D．who |
It ________ we had stayed together for a couple of weeks ________ I found we had a lot in common.
| A．was until; when |
| B．was until; that |
| C．was not until; when |
| D．was not until; that |
My former class teacher asked me to go and see him whenever _________.
| A．I will be convenient |
| B．it will be convenient |
| C．I am convenient |
| D．it is convenient |
It was two days before my mother flew to New York ______I arrived home.
| A．when | B．that |
| C．after | D．since |