— How could they keep us waiting for so long? — They got on the bus half an hour ago and they ________ be here in ten minutes, I think.

He ______ the key, so we ______ into the office.

The government demanded again that the public      the rumour.

--- Who told you my address ? --- I don’t remember clearly. It _____ Li Mei.　 ---It _____ Li Mei. She doesn’t know it.

---Imagination     important in science, and it helps us dream up our future.---You are definitely right. If only something         allow me to see insects and spiders magnified without getting close to them.