问题
选择题
His teacher worried that the student spent too much time on the computer and not enough time _______.
A．to study
B．study
C．studied
D．studying
答案
答案：D
考查短语spend time (in) doing sth “花费时间做某事”。句意：老师担忧学生们花费太多的时间在电脑上没有足够的时间学习。