The new plane will __________ a series of test flights before it is put into use.
164. It is said that the headmistress _____ three months ago will soon _____.
163. Hearing the sad news that she lost the game, Jane’s mother couldn’t help _____.
162. Can youme out with this maths problem. I am not very good at maths.
161. I will write to my mother, for Iher yesterday.
160. It seemed that there was strange sound outside. We ________ carefully but_____nothing.