With a lot of tough problems , the pilot was still calm, cool and collective under pressure.
I don’t know _________.
When we practice speaking English, we often end up _____ in Chinese.
----_____do you improve your listening? ----I improve it ______ listening to tapes. A. How; with B: What; withC: How; by D. What; by
He ______ be a history teacher.
Most of the students near______ Arthur was sitting appeared to be taking notes.So Arthur pretended to do the same.