---Hey, Tom. Let's go swimming.---Just a moment. I______a message.
A: send
B: sent
C: am sending
D: have sent
                    A: send
B: sent
C: am sending
D: have sent
举一反三
- — Hey, Tom. Let’s go swimming.— Just a moment. I ______ a message.
 - I am against children _______ to school before they are six. A: who send B: being sent C: sending D: having sent
 - Tom insisted on his cat ______ to hospital. A: send B: been sent C: sending D: being sent
 - Lot's of rescue workers were working around the clock, ____supplies to Yushu after the earthquake. A: sending B: to send C: having sent D: to have sent
 - It was no use ________ him to a hospital. A: to send B: sent C: sending D: to be sent
 
