Dashan, who ______crosstalk, the Chinese comedic tradition, for decades, wants to mix it up with the Western stand-up tradition.
will be learning
is learning
had been learning
has been learning
Had the government limited the sales of cars much earlier, traffic jam and pollution _______so serious now.
____today, he would get there by Friday.
Had they known what was coming next, they _________second thoughts.
Had you taken it more seriously, you ________ such a silly mistake.
_________, the world would be more harmonious.