80. It's important for us __________ (learn) English well.

　　81. Please _______(not go) out. it's raining hard outside.

　　82. Keep quiet. I ___________ (read) a newspaper.

　　83. How many ________ (visit) are there on the bus?

　　84. I don't want you ________ (go) out at night.

　　85. It's time for lunch. Let's stop ___________ (have) it.

　　86. We went on _________(study) after we had a short rest.