He had to retire(退休) early ______ poor health.
| A．as a result | B．because |
| C．so | D．because of |
One of the most interesting places in Yangzhou ________ are often visited by foreigners is the West Slender Lake.
| A．what | B．who | C．that | D．/ |
—I can’t find Mary. Where’s she?
—Sorry, I don’t know ______.
| A．where has she been | B．where she has been |
| C．where has she gone | D．where she has gone |
—Is the film interesting?
—I thought it would be. But ______, it’s very boring.
| A．in all | B．in fact | C．in addition | D．in future |
—______ did you sleep last night?
—Only five hours. I stayed up late to do my homework.
| A．How soon | B．How often | C．How long | D．How much |