Have you thought of the topic for the composition? —Not yet, I _______ it very carefully, but I haven’t decided

I’ve no idea how much work it is to be _____ a World Expo but I’m sure they’ve done a lot

a0;used to see each other       , but I haven’t head from him since last year.

Go back to your room and leave meI like being by myself

______ at the top of the Oriental Tower, people below will look very small.