I often use micro-blog to communicate with others.– You are so smart! Can you please tell me _____

The parents were in search _______ theirson who was lost when the two countries were ______ war.

It is _____ that Professor Smith will give us a lecture tomorrow.

The Science Museum, ______ we visited during a recent trip to Britain, is one of London’s tourist attractions.

ea for the new plan came to his mind, ______ to hisexperiment in the lab.