The art club is for members only. You can’t go in_______ you are a member.

How I wish I had studied harder when I was in seniorschool! —If you had，you ________ a university student now.

Look! There is a horse racing program on TV now.— Hmm. It_______ interesting.

下列四种不同的表达语最得体的一项是

ndmother is over 90 years old, ______loss of memory.