—Where is you pencilbox,Tom?—I’ve __________ it for this kite.

Once new difficulties _____ in our new job, we should learn to use our brain to deal with it.

This robot is supposed to save a lot of labor, but it remains a problem if it ______.

——Were you busy last weekend?——Very. Rather than ____ time playing cards as usual, I devoted every effort to ____ an advertisement.

They own two cars, not to _____ a motorbike.