Since your English is poor, why not ________ an English club to improve it?

To make members of a team perform better, the trainer first of all has to know their ______ and weaknesses． 

 “Our brand is selling just like hot cakes,” said the director with a ______ expression on his face.

Most Jewish families ________ many difficulties during the Second World War.

Nowadays, Internet shopping will really_____when people are   sure    that it is safe.