The young man always talks a lot ___________ he knew everything, which, of course, makes others unhappy.
| A．once | B．even though | C．though | D．as though |
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 |