Not until he left his home _____ to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．that he began | D．he had begun |
______ some problems have arisen in the process, we are confident that we can handle them.
| A．As | B．If | C．While | D．Since |
— Shall I give you a hand with this as you’re so busy now?
— ____.
| A．You’re welcome | B．It’s all right | C．You’re kidding | D．It’s so kind of you |
Right now, lots of people search for products on the Internet but still buy them at stores. Internet shopping will really ____ when people are sure that it is safe.
| A．set up | B．set off | C．take off | D．take up |
This book is said to be a special one, as it ____ many events not found in other history books.
| A．writes | B．prints | C．covers | D．reads |
The students will discuss a number of cases ____ beginners of English fail to use the language properly.
| A．where | B．who | C．which | D．as |