Many people took part in 10,000-metre race, but only ____________ them kept on running to the end.

This kind of bird is _____, and we should do what we can to _____it[ ]

Have you got any idea for the summer vacation?—I don’t mind where we go ______ there’s sun, sea and beach.

Lily is so kind-hearted a girl that she often gives__________ needs her help

s no way of knowing why one man makes animportant discovery ________ another man, also intelligent, fails