— I really don’t know how to thank you enough.
— _____.
| A．No problem | B．Think nothing of it |
| C．Not at all | D．It doesn’t matter |
I try to understand __________ that prevents so many Chinese from being as happy as one might expect.
| A．why is it | B．what is it | C．why it is | D． what it is |
Desertification，the name for ______ happens when farmable land is turned into desert，is a growing world problem.
| A．which | B．where | C．what | D．How |
Some students held the view ______ surfing the Internet was good for their study.
| A．that | B．what | C．when | D．Which |
It was believed by the ancient Egyptians that intellect was to the mind ___sight was to the body.
| A．what | B．so | C．that | D．like |
Since it is expected that Fed will cut interest rate again, there is no doubt ___the company will make the decision on raising the price of crude oil.
| A．why | B．that | C．whether | D．when |