I’m sorry. I ________ at you the other day.-Forget it.I was a bit out of control myself.[ ]

He doesn’t drive a car ______ his brother.

The reason ______ Tom came to attend the meeting was ______ he was an expert in this field.

The scientists ________ on the new medicine fortwo years. They will succeed in no time.

My Grandpa is lovely and ________, but sometimes he is not ______ me.[ ]