________ you have seen things like these before doesn't matter.
Is there a shop around ______ I can get some stamps and envelops?
—Li Ming went abroad in 2000.—No wonder. I ______ him ever since.
It won’t be quite a long time ________ your son is back, so don’t be worried.
—Can I use your tape recorder for a while?—Yes, ____________.
—Are you coming to the English evening?—I’m not sure. I ________ go to the concert instead.