The question of _________ English will keep on changing in the future,though most people doubt,is actually easy________.
A number of people suffer ill effects from drugs ______ they take the drug exactly as directed.
The silence of the library is sometimes broken by a sudden cough or the sound of pages _____.
It is said that _____ good companion is better than _____ fortune, which can’t buy true qualities.
--- Shall I give you a hand as your case is so heavy? ----Thank you._____.
___he hasn’t come is_______ he is busy writing his novel.