几道高一英语填空题
根据句意填入空白处相应的介词+关系代词:
1.Thecleverboymadeaholeinthewall,_____hecouldseewhatwashappeninginsidethehouse.
2.Thetwothings__________Marxwasnotsureweregrammarandsomeofidioms.
是介词+关系连词!