3. The vacuum cleaner is a valuable labor-saving () action. A. device B. engine C. piece D. instrument ...
16. forge means to make, develop, or shape sth. A. 错误 B. 正确 ...
11. challenge means to invite sb. to compete or fight to prove who is better A. 错误 B. 正确 ...
5. .invaluable means of no value A. 错误 B. 正确 ...
17. Mr. Crowther, for his part, had also suffered some () A. tycoon B. distraction C. decorated D. interact ...
8. In education there should be a good () among the branches of knowledge that contribute to effective thinking and wise judgment. A. distribution B. balance C. combination D. assignment ...
3. restrain means to prevent someone from doing something harmful or stupid A. 错误 B. 正确 ...
16. Without a wholehearted () to a keen forward-looking vision and deep insight, you cannot be a leader. A. determination B. resolution C. commitment D. obligation ...
9. At that time work was mainly () to slaves in that society A. blamed B. complained C. restricted D. expected ...
4. () energy under the earth must be released in one form or another, for example, an earthquake. A. Accumulated B. Gained C. Assembled D. Collected ...