41. "We have some accidents on this line, but no accidents ___B___ since last winter."
A: A. had occurred occurring
B: B. have occurred
C: C. occur
D: D. are
A: A. had occurred occurring
B: B. have occurred
C: C. occur
D: D. are
举一反三
- "We have some accidents on this line, but no accidents ______ since last winter." A: had occurred B: have occurred C: occur D: are occurring
- "We have some accidents on this line, but no accidents ______ since last winter." A: had occurred occurring B: have occurred C: occur D: are
- 4. Some of the accidents might have been avoided if we ___ his advice. A: follow B: followed C: have followed D: had followed
- Without these achievements, the opening of the west ____ A: couldn't occur B: needn't have occurred C: couldn't have occurred D: can't occur
- Have you any _____ to support your conclusion? A. incidents B. evidence C. accidents D. absence A: incidents B: evidence C: accidents D: absence