He always brings me a pretty gift ____ he comes to visit me.A by the time B sometimes C every time D at times
—Don't you know that a proper amount of exercise a day will ________ to a person's health? —No wonder so many senior citizens do exercise in the square.
The home ________ the lion is Africa while the koala bear is native ________Australia.
You can't see anything clearly through a telescope unless it ________ correctly to your sight.
The special medicine for the disease was difficult to find though ________ everywhere.
So many problems ________, he is having a difficult time.