If you swim in a river or lake, be sure to investigate is below the water surface. Often there are rocks or branched hidden in the water.
| A．what | B．who | C．that | D．whoever |
It is dangerous to __________ in the forest，because you are easily lost.
| A．go through | B．go over |
| C．go about | D．go off |
The dictionary __________ 10，000 words，__________ many in science.
| A．contains；includes |
| B．is containing；including |
| C．includes；contains |
| D．contains；including |
The policeman stopped the stranger and asked him where he __________．
| A．hung up | B．hung together |
| C．hung out | D．hung on |
_________ you are right in refusing to join that club.
| A．In a sense | B．In the sense |
| C．At a sense | D．At the sense |
Life is like a long race __________ we compete with others to go beyond ourselves.
| A．why | B．what |
| C．that | D．where |