Not until the train pulled into the station that his suitcase was gone.

Our team’s success was ________ the efforts of Mr. Mark, who is ________ arrive here in ten minutes.

Credit cards are ________ useful when travelling— True They save us the trouble of taking too much cash [ ]

Generally speaking, ______ according to the directions, the drug has no side effect [ ]

At present, one of the best ways to study is working in groups.—More chances ___________ to students to learn from each other.