He opened his mouth as if ________something.

I’ve passed the driving test! –I’m glad to hear that you _____ it at last!

This kind of tree is widely ______ in our country

China’s first moon rover, Yutu, or Jade Rabbit touched the lunar surface at 9:14 a.m.on December 14,2013, ________deep trace on the loose lunar soil.

Some students often listen to music _____ classes to refresh themselves[ ]