40. I could have offered you some help last weekend, but I ______ with my work at that time.
Children areto meet with setbacks as they grow up, so their parents don’t have to worry about it.
You’d better let each student read his own tastes and choices.
The activity is held annually in Chinatown with the purpose of the Chinese tradition.
—Wow, where is my purse? ---! We will be late for the picnic.
It is not always easy for the public to see _______ use a new invention can be of to human life.