He looks good ____red while black looks good _____me.
| A．in ; on | B．on; in |
| C．in; in | D．on; on |
-- _______ is the man in the white shirt? -- He is an engineer.
| A．How | B．Where |
| C．Who | D．What |
In our library, the number of books ________ more than 40,000.
| A．is | B．are |
| C．has | D．have |
The entrance exam is only fifteen days away from now. You will fail the exam ______ you study hard from now on.
| A．if | B．as soon as |
| C．unless | D．although |
Jack found ______ hard to get along with the other boys in his class.
| A．it | B．that |
| C．this | D．those |
I have _______ to tell you. Please listen to me.
| A．important something | B．something important |
| C．important anything | D．anything important |