Mike had just finished his lunch and was about to take a break _____ an unexpected visitor came.
A. when B. while C. so D. for
The main road _____ for repairs, so we had to change the route to the downtown.
A. is being closed B. has been closed C. was to be closed D. had been closed
____ the main idea of the text, and you will be able to answer the question.
A. Grasp B. To grasp C. Grasping D. Grasped
The car is environmentally friendly because it uses electricity instead of gas. _____, it is less expensive.
A. Besides B. However C. Instead D. Therefore
She showed me a red silk dress _____ online, which cost her only 10 dollars.
A. to be bought B. being bought C. bought D. having bought
Having no enough time to practice, the girl wondered whether she _____ pass the driving test.
A. should B. could C. might D. must
