Excuse me, is this ________ new pencil sharpener —Yes, it’s ________. He bought it just now.

The students _______ their homework carefully when the teacher walked into the classroom quietly.

The visitors were admiring the charming flowers ______ it started to rain.

Our English teacher told us to find out ____the differences between American English and British English lie.

Lisa was punished by her mother because she went out to play ____ her homework unfinished.[ ]