Helping others is a habit, ___ you can learn even at an early age.
| A．it | B．that | C．one | D．those |
The sun ___ red.It __ in the east.
| A．is…rise | B．is…rises | C．is…rising | D．will be…rise |
To answer correctly is more important than ___.
| A．finishing quickly | B．you finish quickly | C．to finish quickly | D．a quickly finish |
Great changes ___ in our city since 1977.
| A．take place | B．have taken place | C．took place | D．are taken place |
The fact has worried many scientists ______ the earth is getting warmer and warmer these years.
| A．what | B．which | C．that | D．though |
—How about your journey to Mount Emei?
—Everything was wonderful except that our car _________ twice on the way.
| A．slowed down | B．broke down | C．got down | D．put down |