______ in color, the garden looks dull in this late fall.
A．Lack B．Lacked C．Lacking D．To lack
--- Albert, I have a favor to ask you.
--- _______.
A．It’s a pleasure B．Go ahead C．Help yourself D．It doesn’t matter
“The moment ______ soon,” he thought to himself, waiting nervously.
A．is coming B．was coming C．came D．has come
______ nearly all behavior is learned behavior is a basic assumption ______ has been put forward by the social scientists.
A．What, that B．That, what C．What, what D．That, that
He is very ______ and well-qualified, so he should reach the top of his profession.
A．proud B．jealous C．ambitious D．enthusiastic
______ nobody else at hand, I had to carry the heavy box to the eighth floor by myself.
A．It having B．It has C．There was D．There being
