I believe ________ you have tried your best and ________ you can come to the top of the class.

Children who are not active or _____ diet is high in fat will gain weight quickly.

Iraq has _______ too many wars since the 1990s, making his people _______a lot.

Thomas _____ in inventing many electricalmachines

The number of students in our school _________ 4000 and a number of them _______ good at playing pingpong.