______ along with host families, I believe, language travel students are likely to get enough language practice.
| A．Stay | B．Having stayed |
| C．Staying | D．To stay |
There are many new central leaders in China now, ________ many once worked in the western provinces.
| A．in which | B．of whom |
| C．in whom | D．for whom |
Some passers-by witnessed the car accident ______ five passengers were killed.
| A．where | B．which |
| C．that | D．when |
John returned with two workers, with_______ help we finally got the car out of the mud.
| A．whose | B．their |
| C．which | D．that |
I am looking forward to the day my daughter can read this book and know my feelings for her.
| A．as | B．why |
| C．when | D．where |
--- Is it true that Mike refused an offer from Yale University yesterday?
--- Yeah, but I have no idea _______ he did it; that’s one of his favorite universities.（2014）
| A．when | B．why | C．that | D．how |