Tom says he ______ you and is helping you with the research at present.
Experts are trying to work out a plan to deal with the problems caused by global warming _________ it is too late.
Look over there—there’s a very long, winding path _________ to the house.
It is in Hong Kong _______ you’re going to find the cellphone _________ you have been wanting to buy.
We are all ________ with the natural beauty of Lijiang and decide to visit it again next year.
________ many times, he finally understood it.