— Why didn’t you go to Mike’s birthday party yesterday?—Well,I ____,but I forgot it.
.We cannot figure out ____quite a number of insects, birds, and animals are dying out.
.----What did he want to know,Anne?-----_______I could finish writing the report.
. _____is known to us all is that the old scientist, for____ life was hard in the past,still works very hard in his eighties.
.We live day by day ,but in the great things, the time of days and weeks ______so small that a day is unimportant.
.Having checked the doors were closed, and _____all the lights were off, the boy opened the door to his bedroom.