There are many tall old trees____ in and around our school.
In the noisy crowd, I had to raise my voice to make myself ___________.
As we can see, Peter is very happy, so he___________ have passed the exam. After all, it’s not difficult at all.
—Is Bob still a volunteer?—No, but he _____. He worked for the 2008 Beijing Olympic Games.
You’d better _______ because I’m busy writing a letter to my parents.
Last month we students all had some great speeches. The headmaster together with some other teachers __________ to attend it, too.