The students found it easyto_______ what the experienced teacher had taught

The teacher said that ____________________

From the date________on the coin, we knew that it was made 500 years ago [ ]

Many strange new means of transport have been developed in our century, the strangest of _______ being perhaps the hovercraft(气垫船).

Mike，could you come andgive me hand — OK，Mum. I’m coming now.