We can relax ourselves by taking part in school activities after long hours’ study; _______, we
can learn a great deal from other students.
| A.therefore | B.but | C.however | D.besides |
The air is deadly polluted because some factories don't ________ the rules to protect the environment.
| A.appreciate | B.regard |
| C.honor | D.respect |
The visiting minister expressed his satisfaction with the talks, ______ that he had enjoyed his stay here.
| A.having added | B.to add |
| C.adding | D.added |
You should try not to get ________ in the trouble between them.
| A.lost | B.involved |
| C.absorbed | D.trapped |
Many countries are in great need of natural gas, wind and other forms of ________.
| A.power | B.source | C.energy | D.material |
Good heavens! There you are! We were all ________ about your safety. We were expecting you to come back much earlier all through the night.
| A.curious | B.concerned |
| C.upset | D.interested |