For weeks, the street hasn’t been cleaned by the cleaners, _______makes it very dirty.
| A．who | B．which | C．that | D．this |
This book ______ Tom’s father’s, because his name is on the book.
| A．maybe | B．may be | C．must be | D．must |
This question is ______ easy, all the students can answer the question.
| A．too much | B．too many | C．much too | D．many too |
I don’t know _________.
| A．what to do it | B．how to do it | C．what to do | D．to do what |
When we practice speaking English, we often end up _____ in Chinese.
| A．to speak | B．speaking | C．spoken | D．speak |
----_____do you improve your listening?
----I improve it ______ listening to tapes.
A. How; with B: What; withC: How; by D. What; by