Effecting shipment before receiving L/C will be out of（）.

A:question B:the question C:questions D:a question

______ before you leave the lab.

A:Make sure that the windows are shut B:To make sure that the windows are shut C:Making sure to shut the windows D:To be sure to shut the windows

Another two months will be needed before the new bridge ______.

A:completes B:is completed C:has completed D:will be completed

I’ve never seen ______ before.

A:such a interesting film B:so interesting film C:such an interesting film D:so film interesting

We'll get in all the wheat before the sun ______.

A:will set B:was set C:set D:sets

They are busy ______ in their lessons before the exam.

A:going after B:going over C:going by D:going ahead

（） before you leave the lab.

A:Make sure that the windows are shut B:To make sure that the windows are shut C:Making sure to shut the windows D:To be sure to shut the windows

PROCEDURES BEFORE BOARDING 的中文为（ ）

A:登机前手续 B:上船前手续 C:登机前程续 D:上船前程序