It is widely reported in the western media that thedrug ______ is now becoming a leading cause of teenager crimes.

The lock in my bag _______me of not locking my door .

In my opinion, Jack, though relatively stubborn, was not too difficult ___

One of the students from France. He speaks .

In order to finish the research, the professor always _______, for every day the light in his room didn’t go out until 2 a.m.