Over fifty countries _______ the AIIB(亚投行) so far.
| A．joined | B．was joining |
| C．had joined | D．have joined |
With more forests being destroyed, huge quantities of good earth _______ each year.
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
—What were you up to when she dropped in?
—I _________ for a while and __________ some reading.
| A．was playing; was going to do | B．played; did |
| C．had played; was going to do | D．had played; did |
—Have you heard from Janet recently?
—No, but I ______ her over Christmas.
| A．saw | B．will be seeing | C．have seen | D．have been seeing |
—I haven’t seen you for ages. Where have you been?
— I _______ on leave in Europe.
| A．have been | B．am | C．was | D．had been |
—Can I help you, Madam?
— No, thanks. I_______.
| A．have just looked around | B．just look around |
| C．just looked around | D．am just looking around |