Experiments of this kind____ in both the U.S. and Europe well before the Second World War.

Eating too much fat can________to heart disease and high blood pressure. [ ]

下列各句中，没有语病的一句是（ ）

When it comes to job interview, you really don’t know ______ you performed until you get the good-news call．

Last summer we visited the West Lake, ______Hangzhou is famous in the world.