141. I last saw Bob when I was in Ho Chi Minh City. → I haven't seen .............................................................................................. 142. It is a three-hour drive from Hanoi to Nam Dinh. → It takes ........................................................................................................ 143. It's a pity you didn't tell us about this. → I wish ........................................................................................................... 144. They think the owner of the house is abroad. → The owner ................................................................................................... 145. The children couldn't go swimming because the sea was very rough. → The sea was too .......................................................................................... 146. When did you first know him? → How ............................................................................................................. 147. Their trip lasted three day. → They had ..................................................................................................... 148. It may rain hard this afternoon, so take the rain coat with you. → In case ....................................................................................................... 149. She had to do the washing up but she didn't. → She forgot..................................................................................................... 150. English is easy to learn. → It .................................................................................................................. giải thích đầy đủ theo câu ko nói lèo nhèo