1.What_______ the people over there doing now?
They _____ (dig) holes to plant trees.
这里第一空是用is还是are?我记得老师说什么people单复同行什么的,应该是那一个啊?说一下理由!
2.What hobby group do you ______ after school?
A.join B. join in C.take part in D.take part
这里hobby group前面要用什么啊?