问题

Would you like________ the environment?—I don’t know. What can I do?[ ]
A: help save
B: helping save
C: to help saving
D:to help save
B: helping save
C: to help saving
D:to help save
正确答案是:
同类题型
It is _________ mobile phone he sent me. I’ve never seen _________ better one before.
Sometimes I work _____ the day and sometimes _____ night. [ ]
I usually play basketball ______ Wednesday afternoon. [ ]
We want a teacher to teach_______.
I’m not going swimming this afternoon.— ______. I have to help my mother do some cleaning.