When you drive through the Redwood Forests in California, you will be _____ trees that are over 1,000 years old.
among
against
behind
below
If my lawyer ______ here last Saturday, he ______ me from going.
______ the good chance to get promoted then, he would be a sales manager now.
They were abroad during the months when we were carrying out the investigation, or they _____ to our help.
Without you, I _______ the first prize in the speech contest. Thank you, John.
________ it rain tomorrow, we should have to put off the visit to the Yangpu Bridge.