_________ there are certainly times when giving up trying is the right thing to do, in most cases all needed is commitment and communication.
| A．Unless | B．Before | C．Although | D．Since |
There has been_____ rising demand for grain as_____ industrial material in spite of the nation’s
good harvests.
| A．/, an | B．a, an | C．the, an | D．a, / |
______ the owner’s electric blanket was on fire, the pet cat kept scratching on the bedroom door till she woke up, ____ her life miraculously.
| A．Realized, saving | B．Having realized, saved |
| C．Realizing, saving | D．Realized, saved |
—Hi, Mary. It never entered my head that you’d come. What a surprise!
—I’m on a business trip in the city and I ______ in on you.
| A．dropped | B．drop | C．had dropped | D．have dropped |
We should try every effort to prevent violence from happening at school, ______ more and more students would drop out of school ______ their personal safety could not be guaranteed.
| A．though; if only | B．though; so long as | C．for; now that | D．for; if |
Cathy is always willing to lend me an ear, especially when I’m upset, and offer me ______ advice she can.
| A．that | B．which | C．what | D．whose |