I’m pleased ______ should be done has already been done.
The book didn’t _______to children probably because she employed too many scientific terms.
Selina has recently ___________ Chinese painting to please her grandmother who was born in China.
Please remain ___________ until the aircraft has come to a complete stop.
--- What on earth is that noise? --- Oh, the next flat ___________.
The ____________ on his face told me that he failed in the exam.