It was a small place then compared to _______ it is now.
A
whatitis是介词to的宾语从句，相当于一个名词。comparedtowhatitisnow：与它现在的样子相比。
The other timing system belongs in our internal clocks，which，left ________，would tie the body to a 25-hour rhythm.
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
Iaskedhimto________meafewminutessothatwecouldgooveralltheproblems.
_______ for the free ticket, I would not have gone to see film so often.