Can you explain ______ the OPEC can have such total control over the price of oil?
| A．how is it that | B．that how | C．how it is that | D．what is it |
__________she couldn’t understand was__________fewer and fewer students showed interest in her lessons.
| A．What；why | B．That;what |
| C．What；because | D．Why；that |
When you answer questions in a job interview，please remember the golden rule：Always give the monkey exactly__________he wants.
| A．what | B．which | C．when | D．that |
Mr.Hall understands that__________maths has always been easy for him，it is not easy for the students.
| A．unless | B．since | C．although | D．when |
Perseverance is a kind of quality and that’s __________it takes to do anything well.
| A．what | B．that | C．which | D．why |
__________ we’ll go camping tomorrow depends on the weather.
| A．If | B．Whether | C．That | D．Where |