Jack is very exhausted, he should stop ________ and go out for a rest.
A: to study
B: studying
C: of studying
D: to have studied
A: to study
B: studying
C: of studying
D: to have studied
举一反三
- "I'm very tired.""We really should stop ______ and go to bed." A: to study B: studying C: of studying D: from studying
- By next summer he _______________ at Harvard University for five years. A: will have been studying B: will study C: have studied D: will be studying
- __________, he would have been able to pass the exam. A: If he studied more B: If he should study more C: Studying more D: Had he studied more
- He did very badly on the exam. He ______ harder. A: must study B: must have studied C: should study D: should have studied
- If I ______ harder for the final exam, I should have passed it. A: study B: had studied C: studied D: was studying