—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading.
—Don’t worry. You know, sometimes the Internet ________ be very slow.
| A．can | B．may | C．should | D．must |
Mum ,watch your fish .I smell something____
| A．to burn | B．burns | C．burnt | D．burning |
Never in my life I forget the days ____we used to play together when we were children.
| A．where | B．that | C．which | D．when |
__seems easy to some people seems difficult to others .
| A．Which | B．That | C．What | D．Whatever |
The twins,______at birth,do not know each other .
| A．separated | B．being separated | C．having separated | D．having been separated |
______to looking after her sick father for 2 years ,she badly needed a holiday.
| A．Devoting | B．Having devoting | C．Having been devoted | D．Devoting herself |