Could I have a look at your product—________.I have brought some with me.

Now that you have a job, you must exert (努力) yourself in ______ you do at work.[ ]

Jack wasn’t saying anything，but the teacher smiled at him________he had done something very clever(2011·湖南，33)

I hope the spring in Chongqing can last longer—-Me, too. The weather is fine and beautiful flowers _______ everywhere.

It suddenly occurred to him ____ he had left his keys in the office.