—Can we go camping tomorrow，as planned?—I'm afraid not.The dark clouds ________a heavy rain.

 At present  ________ of the experiments  ________done in labs after the new building has been finished. 

Brian was about to_______________ when he suddenly found an answer to the question.

（天津市河东区201 4年高三二模考试）3.1 wonder if this dress is____in a larger size. This one is too tight.

 It's a rule for all the students to _____ their places ahead of 5 minutes waiting for the class to be started.