________ the mountains was hard work for them but as they looked around, they could not help screaming.
| A．Climb | B．To climb | C．For climbing | D．They climbed |
—I rang you at about nine, but there was no reply.
—Oh, that was probably I was seeing the doctor.
| A．why | B．when | C．what | D．that |
She looks sad. Could you please tell me ____ that prevents her from being as happy as before?
| A．what it is | B．it is what | C．how it is | D．it is how |
I think that this meal was well worth _______ was charged for it.
| A．that | B．what | C．which | D．how many |
After five hours’ drive, they reached ______ they thought was the place they’d been dreaming of.
| A．that | B．where | C．which | D．what |
It is said that the famous football star is now willing to play for_____ would pay him three million dollars a year.
| A．anyone | B．whomever | C．no matter who | D．Whoever |