I’m sorry you’ve been waiting so long, but it’ll still be some time ____ Brian get back. before B. since C. till D. After
—May I go outside and play for a while, Dad?—No, you can’t ____ your homework is being done.
_____ I heard his voice trembling did I realize what trouble he was in.
—Don’t always answer me with a simple “Yes” or “No”. Explain ______possible.—OK. I’ll try my best.
This is such a wonderful film ______ we have never seen before.
—Excuse me. Did you notice whether the No. 108 bus had gone by?—Not ____ I’ve been standing here.