Where have you been recently?-I ________ in Beijing on business for a week last month.[ ]

Did you remember to give Mary the money you owed her? -Yes, I gave it to her ________ I saw her[ ]

.No matter how great the difficulty is, it can’t _____the experts from finishing the project on time.

I noticed her eyes ______, becausethey were very large and beautiful.

st have arrived there yesterday,_____