The planes have to undergo _____ safety checks.
举一反三
- The planes now have to _______ very thorough safety checks. A: hunch B: undergo C: torment D: sigh
- Production _________ while safety checks are carried out.
- 4. All passengers and those who come to pick up or see people off must undergo security checks.
- 检查之间的最短时间是两分钟。 A: The minimum time between checks is two minutes. B: Allow at least two minutes between successive checks. C: The least interval between successive checks is two minutes.
- 允许连续检查之间至少间隔两分钟。 A: The minimum time between checks is two minutes. B: Allow at least two minutes between successive checks. C: The least interval between successive checks is two minutes.