Bob， dinner is ready． Please wash your hands ________ you eat．（ ）
| A． |
until |
B． |
after |
C． |
while |
D． |
before |
Daniel has tried to lose ___________ by eating less recently，but two kilos has been put on instead．（ ）
A．weightB．weightsC．heightD．heights
Two months ago，China tested its ___________ aircraft carrier （航空母舰） built completely on its own．（ ）
A．oneB．firstC．the oneD．the first
Jessica used to be a manager in a company，but she gave up ___________ job when she became a mother．（ ）
A．sheB．hersC．herD．herself
I went to __________ supermarket to buy ___________ birthday gift for my aunt yesterday．（ ）
A．an，aB．a，aC．the，/D．/，the
﹣She got full marks in the math exam．
﹣Her parents were __________ her．（ ）
A．satisfied withB．tired of
C．worried about