–Shall we go and ________ hello to the foreign teachers?–Good idea! Let’s go.

 I really found it difficult to read, for his eyesight was beginning to________.

Listen! Can you hear someone              ?

She used to ______ with her parents, but now she is used to ______ with her classmates at school.

The workers in HuaShan Mountains have to     rubbish to keep the mountains clean.