What does Canton Fair focus on, expor trade or import business？

A、A tedious man

B、An impressive man

C、An oddity

D、A man absorbed in grammar

A、En

B、Con

C、Hasta

D、Según

A、George Washington

B、Ronald Reagon

C、Thomas Jefferson

D、Barack Obama

Complete the dialogues with the Present Perfect Simple or the Past Simple of the verbs. ii. A: Hi, Jim! How long __________________ (you / be) home? B: Since / For an hour. I __________________ (take) an earlier train, So I __________________ (be) here since / for two o’clock. Are you hungry? A: I’m starving! I __________________ (not have) anything to eat since / for I __________________ (leave) home this morning. B: Well, I __________________ (make) some sandwiches. Let’s go to the park and have lunch.