As nobody here knows what is wrong with the machine, we must send for an engineer to _______ the problem.
| A．handle | B．raise | C．face | D．present |
He ________ more than 5,000 English words when he entered the university at the age of 15.
| A．has learned | B．would have learned | C．learned | D．had learned |
She can't help _____ the house because she's busy making a cake.
| A．to clean | B．cleaning | C．cleaned | D．being cleaned |
— What should I do with this passage?
—_____ the main idea of each paragraph.
| A．Finding out | B．Found out | C．Find out | D．To find out |
If the weather is fine, we'll go. If _____, _____.
| A．not, not | B．no, no | C．not, no | D．no, not |
Don't you know _____, my dear friend, it is you that she loves?
| A．who | B．which | C．that | D．what |