(2013·山西四校二模)Studies show that students often ________ to too much pressure tend to develop mental problems.
#89073
A
exposing
B
being exposed
C
to expose
D
exposed
推荐题目
There are many old trees in our school, each ________ about 100 years ago. 
#98197
A
dates back to
B
dating from
C
dated back
D
which dated to
When asked why he went there, he said he was sent there ______for a space flight.
#93555
A
training
B
being trained
C
to have trained
D
to be trained
____ her friend was badly hurt, she burst into tears. 
#94310
A
Hearing
B
Having heard
C
To hear
D
Heard