________ scores of times, but he still couldn't understand it.
| A．Having explained |
| B．Having been explained |
| C．Though it was explained |
| D．It was explained |
Charles was alone at home，withlooking after him.
| A． | someone | B． | anyone | C． | not one | D． | no one |
He ______ at the meeting, but his heart attack prevented him.
| A．will speak | B．is going to speak |
| C．had to speak | D．was going to speak |
Remember to send me a photo of us next time you ______ to me.
| A．are writing | B．will write |
| C．has written | D．write |
Sarah hopes to become a friend of _____ shares her interests.
| A．anyone | B．whomever | C．whoever | D．no matter who |
-Did Jack come back early last night?
-Yes. It was not yet eight o'clock _____ he arrived home.
| A．before | B．When | C．that | D．until |