—Do you have ________ difficulty working out the problem?—Yes. It is ________ me.
____you had worked hard, you would have easily passed the final test.
If his parents are convinced ____the fact that his son always focuses his mind his study.
I will go to the science palace to morrow ____ it doesn’t rain heavily.
____ the rain, he insisted, the football game can not be cancelled.
Speaking of Tom, there are several things that are not easy to ____ ,say, his dishonesty.