—How was the professor's lecture?—Impressive. Thank you so much for giving me a lift during the rush hours. If not, I ________ the lecture today.
In order to meet demands they had to ___ production.
But the unpleasant feeling of coldness disappeared at the ___ of teenage students pouring out of their classroom to give him a warm, wordless welcome.
She always helps her mother look after her baby sisiter even though going to school ___ most of the day.
Please switch ___ the light.It is getting dark.
There were ___ interruptions so we didn’t get the work finished.