This is the small house less than 15 square meters, under ______ roof lives a large family of three generations.
| A．which | B．that | C．its | D．whose |
. _____is known to us all is that the old scientist, for____ life was hard in the past,still works very hard in his eighties.
| A．As; whom | B．What; whom | C．It; whose | D．As; whose |
.We live day by day ,but in the great things, the time of days and weeks ______so small that a day is unimportant.
| A．is | B．are | C．has been | D．have been |
.Having checked the doors were closed, and _____all the lights were off, the boy opened the door to his bedroom.
| A．why | B．that | C．when | D．where |
.A woman tearfully explained _____she had recently lost her husband in a car accident.
| A．when | B．how | C．why | D．where |
..His grandfather was among the first to settle in ____is now a famous holiday center.
| A．what | B．which | C．where | D．that |