(2013·高考浙江卷)If what your friend comes up with surprises you，don’t reject it immediately._____ ___，imagine that it is true.

When asked why he prefers bikes to buses, the professor said,  “Riding a bicycle takes __________ half an hour, but it’s more convenient and environmentally friendly. ”

--People should use public transport instead of their own private cars.--- _______.The roads are too crowded as it is.

The plane got back to the airport and landed＿＿＿＿at last. 

Medicine depends on other fields for basic information, particularly some of their specialized branches.