Some insects __________ the color of their surroundings to protect themselves.
| A．take in |
| B．take off |
| C．take on |
| D．take out |
— We had ________ really cold February this year.
－I can’t remember ________ spring when it snowed in Changzhou .
| A．a; 不填 | B．不填; the | C． the; a | D．a; a |
As a _______ rule, most flowers appear in spring.
| A．common | B．ordinary | C．general | D．original |
_______ of the students here _______ from the countryside.
| A．Three-fourths; are | B．Three-fourth; is |
| C．Three-fourths; is | D．Three-fourth; are |
Though he was _______, he looked down upon those who had a lot of money.
| A．well off | B．rich | C．badly off | D．well-known |
We’re talking about the piano and the pianist __________ were in the concert we attended last night.
| A．which | B．whom | C．who | D．that |