Americans usually just say“Hi”or“Hello”, _______ a more formal handshake when they first meet you.
He said that he didn’t know ______ to deal with the matter, so I left.
The way of life he was used to _______ when he came to study in America.
He said that we should protect the ancient civilization from _______.
She told us what she bought yesterday ________ a few apples and some clothing.
Do you know that Yuan Longping is known as ______ father of hybrid rice (杂交水稻)?