1. [单选题]I have a lot of readings _____ before the end of this term.
A. completing
B. to complete
C. completed
D. being completed
2. [单选题]58 . What does “to do that” refer to in the second paragraph?
A. To live with John．
B. To hire a house for John．
C. To allow John to see the children
D. To ask John to set up a regular life.
3. [单选题]半夏的块茎有毒，可入药。( )
A. 正确
B. 错误
4. [单选题]蒴果是由( )的雌蕊发育而成的果实。
A. 合生心皮
B. 具侧膜胎座
C. 具中轴胎座
D. A和B
E. A和B或A和C
5. [单选题]一个胚珠通常能产生( )个胚囊。
A. 一
B. 二
C. 四
D. 多
