Thenewdiscovery_______beofgreatservicetomankind.
Insummer,shewouldsitinthegardenenjoyingthefreshairandthesmellofthethingsshe______.
Hecomplainedtothebooksellerthattherewereseveralpages______inthebook.
重写句子:Whenwearerelievedofworkingpressuresoftheoffice,wecanenjoyhappinessandrelaxationathome.(modifyingphrase)