—It’s dangerous to swim here. Look at the sign!
—Oh, I _______ it.
| A．didn’t notice | B．don’t notice |
| C．hadn’t notice | D．haven’t notice |
The scientists told us _______ about three days from Earth to the moon by spaceship.
| A．whether it takes | B．that it takes |
| C．if did it take | D．that did it take |
My sister likes eating _______, but I don’t like eating them.
| A．meat | B．vegetables |
| C．hamburger | D．some bread |
-- _______ 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 |