To learn English well, we should find opportunities to hear English ______ as much as we can.

—Will you be ______ this evening, Mary?—That depends. I am afraid I will be with my manager discussing a plan.

There were so many people on the platform waiting to ____ the train that we gave it up. 

Mr. Wang told us that he would devote all the time he could spend _______ his oral English before going abroad.

The official ________ to say more about the plan, so the details of it remain secret.