— Sorry for what I have said to you.— ______.
----Jack can’t concentrate on his lessons recently. ----Yes, that might _____ his low score in the last test.
There were two boys in the lab, _______ did the experiment successfully.
Every boy and every girl as well as some teachers who_____ to visit the museum______ asked to be at the school gate before 6 :00 in the morning.
__________both sides accept the agreement will a lasting peace be established in this region.
The time he has devoted in the past years _______ the disabled is now considered ________ of great value.